You've probably seen the classical 'Hello World' concurrent program that showcases languages like Scala and Clojure, but do you know what are the most frequent concurrency problems in Java to begin with? This post by Alex Miller attempts to gather information from a community poll on what are the most frequent concurrency problems in Java. Read Alex Miller's post/poll 'What is the most frequent concurrency problem you’ve encountered in Java?': http://stackoverflow.com/questions/461896/what-is-the-most-frequent-concurrency-problem-youve-encountered-in-java